Method and device for realizing optical channel data unit shared protection ring

Abstract

A method and a device for realizing an optical channel data unit (ODU) shared protection ring (SPRing) are disclosed by the present invention. The method includes: first, receive an ODUj, wherein the ODUj carries an ODUi; then, perform de-multiplexing processing to obtain the ODUi from the ODUj; next, multiplex the ODUi to an optical channel data unit k (ODUk); meanwhile, keep monitoring the ODUk; and when the monitoring result that is obtained through monitoring the ODUk indicates that a failure has occurred, perform a switching on the ODUi; wherein i, j, k are integers equal to or larger than 0, k is larger than j, j is larger than i, and i, j, k are used to indicate different rates of respective optical channel data unit (ODU) signals.

What is claimed is: 
     
       1. A method for realizing service data protection in an optical channel data unit (ODU) shared protection ring (SPRing), comprising:
 receiving, an optical channel data unit j (ODUj), wherein the ODUj carries an optical channel data unit i (ODUi); 
 performing de-multiplexing processing to obtain the ODUi from the ODUj; 
 multiplexing the ODUi to an optical channel data unit k (ODUk); 
 monitoring the ODUk; and 
 performing a switching on the ODUi when the ODUk monitoring indicates that a failure has occurred; 
 wherein i, j, k are integers equal to or larger than 0, k is larger than j, j is larger than i, and i, j, k indicate different rates of respective optical channel data unit (ODU) signals. 
 
     
     
       2. The method according to  claim 1 , wherein monitoring the ODUk comprises monitoring a path monitoring (PM) field in an ODU overhead of the ODUk. 
     
     
       3. The method according to  claim 1 , wherein the switching on the ODUi is performed according to switching request information carried in an Automatic Protection Switching/Protection Communication Channel (APS/PCC) field in an ODU overhead of the ODUk. 
     
     
       4. The method according to  claim 3 , wherein the value of 6, 7, and 8 bits in a multiframe alignment signal (MFAS) field of an OTU signal to which the ODUk is multiplexed is 000, indicating that the APS/PCC field is used by a protection scheme where the ODUk is protected through the switching of the ODUi. 
     
     
       5. An apparatus for realizing service data protection in an optical channel data unit (ODU) shared protection ring (SPRing), comprising a processor and a computer readable medium having a plurality of computer executable instructions stored thereon which, when executed by the processor, cause the processor to implement:
 receiving an optical channel data unit j (ODUj), wherein the ODUj carries an optical channel data unit i (ODUi); 
 performing de-multiplexing processing to obtain the ODUi from the ODUj; 
 multiplexing, the ODUi to an optical channel data unit k (ODUk); 
 monitoring the ODUk; and 
 performing a switching on the ODUi when the ODUk monitoring indicates that a failure has occurred; 
 wherein i, j, k are integers equal to or larger than 0, k is larger than j, j is larger than i, and i, j, k indicate different rates of respective optical channel data unit (ODU) signals. 
 
     
     
       6. The apparatus according to  claim 5 , wherein monitoring the ODUk comprises monitoring a path monitoring (PM) field in an ODU overhead of the ODUk. 
     
     
       7. The apparatus according to  claim 5 , wherein switching on the ODUi is performed according to switching request information carried in an Automatic Protection Switching/Protection Communication Channel (APS/PCC) field in an ODU overhead of the ODUk. 
     
     
       8. The apparatus according to  claim 7 , wherein the value of 6, 7, and 8 bits in a multiframe alignment signal (MFAS) field of an OTU signal to which the ODUk is multiplexed is 000, indicating that the APS/PCC field is used by a protection scheme where the ODUk is protected through the switching of the ODUi.